Hi, so I upgraded from i3 4150 to i5 4570. When i boot my PC the screen is just black but when i place my old CPU back in it works.
My motherboard is ASROCK H81M VG4.
Does the PC turn on? (as in do the fans start or does anything light up?) If it does then is your monitor connected to a discreet GPU or the mobo VGA port?
The 4570 should work in your motherboard. Is this a pre-built PC (Dell, HP, etc...)? What is the make/model of your PSU? The 4150 is 54W and the 4570 is 84W.